參數(shù)資料
型號: XR16L580IM
廠商: EXAR CORP
元件分類: 微控制器/微處理器
英文描述: SMALLEST 2.25V TO 5.5V UART WITH 16-BYTE FIFO AND POWERSAVE
中文描述: 1 CHANNEL(S), 3.125M bps, SERIAL COMM CONTROLLER, PQFP48
封裝: 7 X 7 MM, 1 MM HEIGHT, TQFP-48
文件頁數(shù): 6/47頁
文件大?。?/td> 285K
代理商: XR16L580IM
XR16L580
SMALLEST 2.25V TO 5.5V UART WITH 16-BYTE FIFO AND POWERSAVE
á
REV. 1.2.0
6
2.0
FUNCTIONAL DESCRIPTIONS
2.1
The CPU interface is 8 data bits wide with 3 address lines and control signals to execute data bus read and
write transactions. The L580 data interface supports the Intel compatible types of CPUs and it is compatible to
the industry standard 16C550 UART. No clock (oscillator nor external clock) is required to operate a data bus
transaction. Each bus cycle is asynchronous using CS#, IOR# and IOW# or R/W# inputs. A typical data bus
interconnection for Intel and Motorola mode is shown in
Figure 3
.
CPU Interface
F
IGURE
3. XR16L580 T
YPICAL
I
NTEL
/M
OTOROLA
D
ATA
B
US
I
NTERCONNECTIONS
VCC
VCC
A0
A1
A2
UART_CS#
IOR#
IOW#
D0
D1
D2
D3
D4
D5
D6
D7
A0
A1
A2
CS#
D0
D1
D2
D3
D4
D5
D6
D7
IOR#
IOW#
UART_INT
INT
Serial Interface of
RS-232 or RS-422
Intel Data Bus Interconnections
GND
UART_RESET
RESET
16/68#
RI#
CD#
DSR#
CTS#
RTS#
DTR#
RX
TX
PwrSave
VCC
VCC
A0
A1
A2
UART_CS#
R/W#
D0
D1
D2
D3
D4
D5
D6
D7
A0
A1
A2
CS#
D0
D1
D2
D3
D4
D5
D6
D7
IOR#
IOW#
UART_IRQ#
INT
Serial Interface of
RS-232 or RS-422
Motorola Data Bus Interconnections
GND
UART_RESET#
RESET
RI#
CD#
DSR#
CTS#
RTS#
DTR#
RX
TX
PwrSave
VCC
16/68#
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